Custom post type – List posts by 'Order' number

Hi there,

I am new to the loop. I create a custom post type for a client and everything is working fine. However the client wants to order the display of posts by adding numbers to the post ‘Order’ value.

I have used a very basic loop to display the posts, but it seems to ignore the posts ‘Order’ value and displays the oldest to newest.

I used:

<?php query_posts('post_type=gallery'); ?>
<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<?php
if ( has_post_thumbnail() ) { // check if the post has a Post Thumbnail assigned to it.
the_post_thumbnail('thumbnail');
}
?>

I am sure I am missing something really basic. Any advice please?

[Moderator Note: No bumping. If it’s that urgent, consider hiring someone.]